Bake-oven



2 Sheets-Sheet 1.

(No Model.)

G. A. FISHER.

' BAKE OVEN. N0. 457,191. Patented Aug. 4, 1891.

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' toothed or sprocket wheel h.

UNITED STATES PATENT OEEIoE.

GEORGE A. FISHER, OF LEAVENIVORTH, KANSAS.

BAKE-OVEN.

SPECIFICATION forming part of Letters Patent No. 457,191, dated August4, 1891.

Application filed January 26, 1891:. Serial No. 379,181. (No model.) I

T0 at whom, it may concern:

Be it known thatI, GEORGE A. FIsHER,a citizen of the United States, anda resident of Leavenworth, in the county of Leavenworth andState ofKansas,haveinvented certain new and useful Improvements in Bake-Ovens;and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to letters of reference markedthereon, which form a part of this specification.

Figure l of the drawings is a side View. Fig. 2 is a top plan view, andFigs. 3, 4, and 5 are detail views.

The invention relates to certain new and useful improvements inbake-ovens; and it consists in the novel construction and combination ofparts hereinafter described.

In the accompanying drawings, A represents the oven, having a suitabledoor A. J ournaled in suitable boxes in the side walls of the oven aretwo shafts a a, one toward each end, and carrying near their ends thetoothed or sprocket wheels '1) b b b, one on either end of each shaft. Asprocket-chain 0 passes over each set I) b of the wheels. At suitableintervals the chains 0 are provided with perforated lugs a, carryingpivots c, from the inner opposite ends of which are suspended, by thearms d, the baking-shelves D. This manner of suspending thebaking-shelves will allow them at all times to keep a horizontalposition, no matter in what position the carrying chains may be withrelation to their sprocket-wheels. Sufficient space is of courseprovided in the oven to allow the shelves to be carried entirely aroundby their chains.

The shafts a a project through the sides of the oven and carry at oneend each a small Centrally of these wheels h, and near the bottom of theoven, is journaled the shaft ein a bracket E, secured to the outsidewall of the oven. This shaft carries a sprocket-wheel E. A sprocketchainF passes around this wheel and over the wheels h. The outer end of theshaft e is projected through the outside piece of the bracket E and maybe connected with "any suitable driving-power. ries a winding-drum G, incase weight-power is employed, the inner end of said drum having aratchet-wheel H. The wheelE is loosely mounted on its shaft, and whensaid shaft is turned backwardly to wind the weight-cord on the drum G,said wheel E will not be turned; but when the motion of the shaft isreversed a spring-pressed pawl K of the wheel E will engage the teeth ofratchet H, which is rigidly mounted on the shaft, locking the two wheelstogether, so that the revolution of.the shaft will cause the revolutionof the Wheel E, thereby imparting motion to the shafts a a, through thesprocket-chain F, and to the shelf-carrying chains 0.

A pitman L is secured eccentrically to each Said shaft also carof thesprocket-wheels h, and is connected to I a piston-rod M of a piston m,working in an aircompressing cylinder 0, one for each piston,

and provided with suitable valves n, operated bymeans of the levermechanism P. The arrangement of the two pitmen is such that when onepiston-rod is forced downwardly the opposite one is drawn up. The objectof these compressors is to regulate the speed of the gearing and holdthe movement of the baking-shelves to an even, steady motion.

The reverse end of the shaft a carries a hand-wheel R, by the operationof which the baking-shelves may be brought into con-' venient positionfor filling. A pin 1" may be inserted in one of a series of holes orperforations r in the rim of said wheel, its end bearing against aflange or projection on the wall of the oven and preventing the pansfrom moving While being filled.

This oven is designed to be'heated by a furnace at the bottom, and canbe made of any desired size or capacity. They can also be made so as tobe conveniently portable.

It will be seen that by the mechanism described a steady movement isimparted to the baking-shelves, whereby all portions of the articlescarried thereby will be evenly and regularly baked.

Having thus described the invention, what I claim, and desire to secureby Letters Patent, 1s-

1. The bake-oven havingthe sprocket-wheelcarrying shafts journaledtherein, sprocketchains carried by said Wheels,a series ofbaking-shelves suspended horizontally from said chains, and thegovernors operated by the driving mechanism for regulating the movementof the shelves and their carrying-mechanism, substantially as described.

2. Thebake-oven having the sproeket-wheelcarrying shafts journaledtherein, sprocketchains carried by said wheels, a series ofbaking-shelves pivotally suspended horizontally from said chains, meansfor revolving said mechanism and shelves, and pneumatic governorsoperated by the revolving mechanism for regulating their movement,substantially as specified.

3. The bake-oven having the sprocket-gear carrying thebaking-shelves,the main driving sprocket-Wheel mounted loosely on a shaft journaled ina bracket secured to the side wall of the oven, said Wheel carrying aspringpressed pawl adapted to engage the ratchet of aweight-cord-winding drum also carried by said shaft when the movement ofsaid shaft is in a forward direction, but leaving the ratchet and drumfree to turn alone When the motion of the shaft is reversed, andpneumatic governors operated by the driving-gear, substantially asspecified.

4. The bake-oven having the sprocket-gear carrying the baking-shelves,the sprocket-gear for driving said mechanism, and the air-compressingpistons and cylinders operated by said gear for regulating the movementof the shelves and their carrying mechanism, substantially as specified.

5. The bake-oven comprising the sprocketgear-revolving shelf-carryingmechanism, the driving mechanism therefor, air-compressing governors forregulating the movement of said shelf-carrying mechanism, levermechanism for controlling the valves in said compressors, andahand-Wheel and locking device for operating and holding said shelvesWhile filling, substantially as specified.

6. The bake-oven having the sprocket-revolving gear mechanism carryingthe bakingshelves, the Weight-driven sprocket mechanism fordrivingsaidshelf-carrying mechanism, and air-compressing devices forregulating the movement thereof, substantially as specified.

In testimony whereofI afiix my signature in presence of two Witnesses.

GEORGE A. FISHER. \Vitnesses:

W. WV. HooPER, E. L. CARNEY.

